"Small orange-scarlet hips. Verrier notes there is some disagreement concerning its ability to rebloom."

At least here and for the plant I have that flowered for the first time this past season....once blooming, no repeat at all. Given the heritage of two reblooming roses, I assumed this would rebloom so the above quote is somewhat reassuring.

So it didn't flower at all in it's first season as a grafted bareroot, which is odd given the reblooming nature of it and everything else blooming but it is now covering itself in buds.

Like Robusta (or atleast the plant I got as Rubosta...I have doubts due to it being completely spot free) and unlike other Rugosa and near hybrids in this climate it doesn't shed all it it's leaves. It looses everything but the leaves from the tips of canes (which Robusta does as well) while other rugosa's go completely bare. Those leaves look odd when spring comes and the new foliage sets in, it's clearly "old" looking.

Can say apart from the chloric leaves it has remained spot free.

Out of the few rugosa's I grow this is the only one that seems to need extra care, it has constant chlorosis and so far hasn't set any flowers. It is growing well though and is bigger than Schneewerg (I suppose not investing in flowers gives that advantage). Possibly just a settling in issue...hopefully any way, quite keen to use this in breeding despite the issue to see if it's a useful bridge between two very different classes of roses.

-edit 1 Dec 2018-

Despite being a fairly decent size, it hasn't bloomed at all. All other rugosa's are, including suckers that are not even something you'd call a bush yet (just a long pencil with leaves and flowers). Maybe it's an old wood thing (but that wouldn't really make sense given the heritage)

Unlike most rugosa, this seems to have a more matte finish to the leaves rather than high gloss. Easy to see the rugosa influence in the leaves but very different at the same time.